PortalClipboard.h

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/*
 * Deskflow -- mouse and keyboard sharing utility
 * SPDX-FileCopyrightText: (C) 2026 Synergy App Ltd
 * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
 */
 
#pragma once
 
#include "deskflow/IClipboard.h"
 
#include <QByteArray>
 
#include <libportal/portal.h>
 
namespace deskflow {
 
class EiClipboard;
 
class PortalClipboard
{
public:
  struct SupportedMime
  {
    const char *mime;
    IClipboard::Format format;
  };
 
  // Listed in preference order: richer formats first.
  static constexpr SupportedMime kSupportedMimes[] = {
      {"image/png", IClipboard::Format::Bitmap},
      {"text/plain;charset=utf-8", IClipboard::Format::Text},
      {"text/plain", IClipboard::Format::Text},
  };
 
  static constexpr int kReadTimeoutMs = 200;
  static constexpr int kWriteTimeoutMs = 200;
  static constexpr qint64 kChunkBytes = 64 * 1024;
 
  static QByteArray formatMimeTypes(const char *const *mimeTypes);
  static const SupportedMime *findSupportedMime(const char *mime);
  static const SupportedMime *pickSupportedMime(const char *const *available);
  static QByteArray encodeFormat(IClipboard::Format format, const QByteArray &data);
  static QByteArray decodeFormat(IClipboard::Format format, const QByteArray &bytes);
  static QByteArray readSelectionBytes(XdpSession *session, const char *mime, qint64 maxBytes);

  static void claimOwnership(EiClipboard *cache, XdpSession *session);

  static void serveSelectionTransfer(EiClipboard *cache, XdpSession *session, const char *mime, uint32_t serial);

  static bool
  readSelectionIntoCache(EiClipboard *cache, XdpSession *session, const char *const *mimeTypes, qint64 maxBytes);
 
private:
  static QByteArray dibToBmp(const QByteArray &dib);
  static QByteArray bmpToDib(const QByteArray &bmp);
};
 
} // namespace deskflow